<template>
  <div class="login-container">
    <!-- 导航栏start -->
    <van-nav-bar class="page-nav-bar" title="登录" />
    <!-- 导航栏end -->

    <!-- 登录表单 -->
    <van-form @submit="onSubmit" ref="loginForm" >
      <van-field name="mobile" placeholder="请输入手机号" v-model="user.mobile" :rules="rules.mobile" type="number" maxlength=11>
        <i slot="left-icon" class="toutiao toutiao-shouji"></i>
      </van-field>
      <van-field name="验证码" placeholder="请输入验证码" v-model="user.code" :rules="rules.code" type="number" maxlength=6
        ><i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
        <template #button>
          <!--time : 倒计时时间 1000（毫秒）*60（个数） -->
          <van-count-down v-if="isCountDownShow" :time="1000*60" format=" ss s"    @finish="isCountDownShow=false"/>
          <van-button v-else class="sent-sms-btn" size="small" round type="default" @click="onSendSms" native-type="button"
            >获取验证码</van-button
          >
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button class="login-btn" block type="info" native-type="submit"
          >登录</van-button
        >
      </div>
    </van-form>
    <!-- 登录表单 -->
  </div>
</template>

<script>
import { login, sendSms } from '@/api/user'
export default {
  data () {
    return {
      // 是否展示倒计时
      isCountDownShow: false,
      // 表单数据收集
      user: {
        mobile: 13911111111, // 手机号
        code: 246810 // 验证码
      },
      rules: {
        mobile: [{ required: true, message: '手机号不能为空' },
          { pattern: /^1[3|5|7|8]\d{9}$/, message: '手机号格式错误' }],
        code: [{ required: true, message: '验证码不能为空' },
          { pattern: /^\d{6}$/, message: '验证码格式错误' }]
      }
    }
  },
  methods: {
    // 验证码验证
    async onSendSms () {
      console.log('onSendSms')
      // 1.校验手机号 (后端验证)
      try {
        await this.$refs.loginForm.validate('mobile')
        console.log('验证通过')
      } catch (error) {
        // return处理验证失败终止后面代码的执行,不进行嵌套
        return console.log('验证失败', error)
      }
      // 2.验证通过,显示倒计时
      this.isCountDownShow = true
      // 3.请求发送验证码
      try {
        const res = await sendSms(this.user.mobile)
        console.log('发送验证码成功', res)
        this.$toast('发送验证码成功')
      } catch (error) {
        // 发送失败，关闭倒计时，避免失败倒计时还在继续
        this.isCountDownShow = false
        // 限制同一手机号一分钟之内只能发送一次请求
        if (error.response.status === 429) {
          this.$toast('发送太频繁了,请稍后重试')
        } else {
          this.$toast('发送验证码失败,请稍后重试')
          console.log('发送验证码失败原因不明', error)
        }
      }
    },
    async onSubmit (values) {
      // 兜底校验
      // console.log(11111)

      // 提示校验中
      this.$toast.loading({
        message: '加载中...',
        forbidClick: true,
        duration: 0
      })
      // 请求登录
      try {
        const { data: res } = await login(this.user)
        console.log('login成功', res.data)
        this.$toast.success('登录成功')
        this.$store.commit('updateToken', res.data)
      } catch (error) {
        if (error.response.status === 400) {
          this.$toast.fail('手机号或者验证码错误')
        } else {
          this.$toast.fail('登录失败,请稍后重试')
          console.log('登录失败,请稍后重试', error)
        }
      }
      // 发送请求

      // 跳转页面
      // 清空表单
    }
  },
  name: 'LoginIndex',
  components: {},
  props: {},
  computed: {},
  watch: {},
  created () {},
  mounted () {}
}
</script>

<style scoped lang="less">
.login-container {
  .toutiao {
    font-size: 37px;
  }
  .sent-sms-btn {
    width: 156px;
    height: 46px;
    line-height: 46px;
    background-color: #ededed;
    font-size: 22px;
    color: #666;
  }
  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
}
</style>
